Wow lmfao, I found the problem. I didn't realize what directory the sm_saysounds.cfg file saved to. I figured it went into the same folder as the saysounds.cfg file which is in game directory/addons/sourcemod/configs. This is why every time I updated the file, it never took any of my changes. So I redownloaded the zip file and saw a cfg folder off on its own and thought, no fucking way it is in my main game directory/cfg folder, but sure enough it was.
Damn, such a stupid issue

, I've been trying to mess with this for ages now. But, it's fixed! Thanks for all the help.